Yellow vat dye.



. UNITED g A r s i l/ nnr oFnicE.

ARTHUR. L'U'T'IRINGHAUS AND ERNST SCHWABZ, OF MANNHEIM. GERMANY, ASSIGN- ORS T BADISCHE ANILIN & SODA FABRIK, 035 LUDWIGSHAFEN-ON-THE-RHINE, GERMAN Y,'.A. CORPORATION OF GERMANY.

Patented Nov. if), 1912.

YELLOW VAT DYE.

] ,044,614 Specification of Letters Patent.- No Drawing. Application filed November 3, 1911.

the following is a matter which we regard Serial No. 658,423.

To (1/7 H 1.0777, may concern Be it known that we, An'rmin LiiTIRING- HAUS and ERNST Sci-IwARz, subjects of the King of Prussia,

residing at Mannheim, I Germany, have invented new and useful Imreddish brown solution in cold concentrat d sulfuric acid. Heat together, on the water bath. 10 parts of the product thus obtained. and 100 parts of cmicentruted sulfuric acid; whereupon the color of the solution chunges rovemen'ts in Yellow Vat Dye, of which from dull red-bro\\'n to brilliant bluwred. P

specification.

Our invention relates to :i new coloring as a dihnlogenutcd anthraqninone-t-hioxnnt-hone of :i. constitution corresponding to the formula We can prepare our new coloring matter by first treating l-chloranthruquinonc-2-caroxylic acid with 2.5-dichlor-thiophonol and then treating the product with :1 condensing agent such. for instuncc,':1s C(Hl2(llil';\i((l sulfuric acid. until :1 thioxnnthonc ring is formed.

Our new coloring mutter onsists. when dry, of :1 yellow powder and. in the pure state, has a. percentage composition corresponding to the formula above. It yields :1 brilliant blue-red solution in concentrated sulfuric acid, :1 violet vat in alkaline hydrosulfite solution, and dyes cotton from this Vflt yellow shades of are lent fustnrss against the action of chlorin and light In this invention, hrolnin is equivalent to chlorin.

The following example will serve to illustrote further the nature of our invention. which, hou 'ever, is not confined to this example. The parts are by weight.

Boil together, for about 15 hours, in :i reflux apparatus, 240 parts of l-chlor-anthrin quinone-fZ-carboxyiic acid, 150 parts of 2.5-dichlor-l-thiophenol, 40 ports of caustic soda, 50 parts of caustic. potash, and 600 parts of water. Then filter and acidify the filtrate with dilute acetic acid, filter off the dichlorbenzene-th io 1 anthrequinone-Zcan boxylic acid and wash and dry it. Thescid thus obtained is :1 ye low ponder which yields a reddish yellm solution in caustic alkali and in alkali eeizate, and :1 dull e l. light Vl'hen a test portion, water, is prncticnllx' must in soda solution, t-urc into water.

on being diluted with insoluble in excess of pour the reaction mix; filter oil the coloring out (or and wush it with water and with boillug dilute sodium carbonate solution ll sists of :1 yellow powder which yields a. lien let rat and ll \'(s otton yellow shades of ex cellcnt fastness against the a tion of t'lllfli'lll.

and washing. The L.Ehrlichlor-thiophenol employed in thisexnn'iplc run he ohtuined by treating pnruwlichlorbenzcne with chlorsulfonic arid and reducing the product with zinc dust.

Now what we claim is zl. The vet coloring matter which possesses :1 percentage composition corresponding to the formula so which coloring matter consists, when dry, of

a yellow powder, wliili yields 3 brilliant lJlUQlGd solution in concentrated sulfuric scribing witnesses.

acid, a violvl ml in alkaline llYdIOSUlfiic sulutmn, 111ml \vlnvli dyes (Ullull from tlnsl set our hands in the presence of two sul' l l ARTHUR- LUT'IRII N (ill AU v ERNST SUHWARZ.

in wt yellow shades of excellent fast-mess l \Vitnesses:

against the action of sshlorin and light. J. Anne. LLOYD, In testimony whereof we have liei'euntol JOSEPH PEIFFER. 

